Backlinkwatch is a powerful tool for finding the backlinks of a website. It can accurately find the URLs of websites linking to your site and provide the corresponding PR, OBL, and FLAG values. This is very convenient for many webmasters. However, its speed is indeed not commendable. When I used it to test "Qu Station Collection", it took 7 minutes. This is because it needs to first call data from Yahoo, then find each backlink, get the corresponding value, and then display it on the page. Although it's relatively slow, it's still very worthwhile to use.